feat: 添加平帐功能

lib/data/repositories/account_repository.dart

@@ -87,6 +87,18 @@ abstract class AccountRepository {
   /// 检查账户是否有交易记录
   Future<bool> hasTransactions(int accountId);
 
+  /// 创建账户平账交易
+  /// [accountId] 账户ID
+  /// [ledgerId] 账本ID
+  /// [amount] 平账金额（正数表示增加余额，负数表示减少余额）
+  /// [note] 备注信息
+  Future<int> createAdjustmentTransaction({
+    required int accountId,
+    required int ledgerId,
+    required double amount,
+    String? note,
+  });
+
   /// 响应式监听账户信息变化
   Stream<Account?> watchAccount(int accountId);
 

lib/data/repositories/cloud/cloud_account_repository.dart

@@ -263,6 +263,11 @@ class CloudAccountRepository implements AccountRepository {
         if (toAccountId == accountId) {
           balance += amount;
         }
+      } else if (type == 'adjustment') {
+        // 平账交易：根据金额的正负来决定增加或减少余额
+        if (tx['account_id'] == accountId) {
+          balance += amount;
+        }
       }
     }
 
@@ -298,6 +303,9 @@ class CloudAccountRepository implements AccountRepository {
         balance += amount;
       } else if (type == 'expense') {
         balance -= amount;
+      } else if (type == 'adjustment') {
+        // 平账交易：根据金额的正负来决定增加或减少余额
+        balance += amount;
       }
     }
 
@@ -592,4 +600,14 @@ class CloudAccountRepository implements AccountRepository {
 
     return results.map((row) => _accountFromJson(row)).toList();
   }
+
+  @override
+  Future<int> createAdjustmentTransaction({
+    required int accountId,
+    required int ledgerId,
+    required double amount,
+    String? note,
+  }) async {
+    throw UnimplementedError('云端平账交易创建暂不支持');
+  }
 }

lib/data/repositories/cloud/cloud_ledger_repository.dart

@@ -182,6 +182,9 @@ class CloudLedgerRepository implements LedgerRepository {
         balance += amount;
       } else if (type == 'expense') {
         balance -= amount;
+      } else if (type == 'adjustment') {
+        // 平账交易：根据金额的正负来决定增加或减少余额
+        balance += amount;
       }
       // transfer 不影响总余额
     }

lib/data/repositories/cloud/cloud_repository.dart

@@ -606,6 +606,20 @@ class CloudRepository extends BaseRepository {
   Stream<List<Transaction>> watchAccountTransactions(int accountId) =>
       _account.watchAccountTransactions(accountId);
 
+  @override
+  Future<int> createAdjustmentTransaction({
+    required int accountId,
+    required int ledgerId,
+    required double amount,
+    String? note,
+  }) =>
+      _account.createAdjustmentTransaction(
+        accountId: accountId,
+        ledgerId: ledgerId,
+        amount: amount,
+        note: note,
+      );
+
   // Statistics Repository 方法
   @override
   Future<List<({int? id, String name, String? icon, double total})>>

lib/data/repositories/local/local_account_repository.dart

@@ -144,6 +144,9 @@ class LocalAccountRepository implements AccountRepository {
       } else if (t.type == 'transfer') {
         // 作为转出账户
         balance -= t.amount;
+      } else if (t.type == 'adjustment') {
+        // 平账交易：根据金额的正负来决定增加或减少余额
+        balance += t.amount;
       }
     }
 
@@ -181,6 +184,9 @@ class LocalAccountRepository implements AccountRepository {
           balance -= tx.amount;
         } else if (tx.type == 'transfer') {
           balance -= tx.amount;
+        } else if (tx.type == 'adjustment') {
+          // 平账交易：根据金额的正负来决定增加或减少余额
+          balance += tx.amount;
         }
       } else if (tx.toAccountId == accountId) {
         // 作为转入账户（转账）
@@ -210,6 +216,9 @@ class LocalAccountRepository implements AccountRepository {
           balance -= tx.amount;
         } else if (tx.type == 'transfer') {
           balance -= tx.amount;
+        } else if (tx.type == 'adjustment') {
+          // 平账交易：根据金额的正负来决定增加或减少余额
+          balance += tx.amount;
         }
       } else if (tx.toAccountId == accountId) {
         // 作为转入账户（转账）
@@ -463,4 +472,34 @@ class LocalAccountRepository implements AccountRepository {
           ..where((a) => a.id.isIn(accountIds)))
         .get();
   }
+
+  @override
+  Future<int> createAdjustmentTransaction({
+    required int accountId,
+    required int ledgerId,
+    required double amount,
+    String? note,
+  }) async {
+    logger.info('AccountAdjustment',
+        '📝 创建平账交易: accountId=$accountId, ledgerId=$ledgerId, amount=$amount, note=$note');
+
+    try {
+      final transactionId =
+          await db.into(db.transactions).insert(TransactionsCompanion.insert(
+                ledgerId: ledgerId,
+                type: 'adjustment',
+                amount: amount.abs(),
+                accountId: d.Value(accountId),
+                categoryId: const d.Value(null),
+                happenedAt: d.Value(DateTime.now()),
+                note: d.Value(note),
+              ));
+
+      logger.info('AccountAdjustment', '✅ 平账交易创建成功！ID=$transactionId');
+      return transactionId;
+    } catch (e, stack) {
+      logger.error('AccountAdjustment', '❌ 创建平账交易失败', e, stack);
+      rethrow;
+    }
+  }
 }

lib/data/repositories/local/local_ledger_repository.dart

@@ -118,6 +118,9 @@ class LocalLedgerRepository implements LedgerRepository {
         balance += t.amount;
       } else if (t.type == 'expense') {
         balance -= t.amount;
+      } else if (t.type == 'adjustment') {
+        // 平账交易：根据金额的正负来决定增加或减少余额
+        balance += t.amount;
       }
       // transfer 不影响总余额
     }

lib/data/repositories/local/local_repository.dart

@@ -635,6 +635,20 @@ class LocalRepository extends BaseRepository {
   Stream<List<Transaction>> watchAccountTransactions(int accountId) =>
       _accountRepo.watchAccountTransactions(accountId);
 
+  @override
+  Future<int> createAdjustmentTransaction({
+    required int accountId,
+    required int ledgerId,
+    required double amount,
+    String? note,
+  }) =>
+      _accountRepo.createAdjustmentTransaction(
+        accountId: accountId,
+        ledgerId: ledgerId,
+        amount: amount,
+        note: note,
+      );
+
   @override
   Future<void> batchInsertAccounts(List<AccountsCompanion> accounts) =>
       _accountRepo.batchInsertAccounts(accounts);

lib/l10n/app_en.arb

@@ -1499,6 +1499,9 @@
   "accountTypeOther": "Other",
   "accountInitialBalance": "Initial Balance",
   "accountInitialBalanceHint": "Enter initial balance (optional)",
+  "accountBalanceCurrent": "Current",
+  "accountBalanceTarget": "Enter target balance",
+  "accountAdjustmentHint": "Enter actual balance, system will auto-create adjustment record",
   "accountDeleteWarningTitle": "Confirm Delete",
   "accountDeleteWarningMessage": "This account has {count} related transactions. After deletion, account information in transaction records will be cleared. Confirm deletion?",
   "@accountDeleteWarningMessage": {

lib/l10n/app_localizations.dart

@@ -6570,6 +6570,24 @@ abstract class AppLocalizations {
   /// **'Enter initial balance (optional)'**
   String get accountInitialBalanceHint;
 
+  /// No description provided for @accountBalanceCurrent.
+  ///
+  /// In en, this message translates to:
+  /// **'Current'**
+  String get accountBalanceCurrent;
+
+  /// No description provided for @accountBalanceTarget.
+  ///
+  /// In en, this message translates to:
+  /// **'Enter target balance'**
+  String get accountBalanceTarget;
+
+  /// No description provided for @accountAdjustmentHint.
+  ///
+  /// In en, this message translates to:
+  /// **'Enter actual balance, system will auto-create adjustment record'**
+  String get accountAdjustmentHint;
+
   /// No description provided for @accountDeleteWarningTitle.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_en.dart

@@ -3459,6 +3459,16 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get accountInitialBalanceHint => 'Enter initial balance (optional)';
 
+  @override
+  String get accountBalanceCurrent => 'Current';
+
+  @override
+  String get accountBalanceTarget => 'Enter target balance';
+
+  @override
+  String get accountAdjustmentHint =>
+      'Enter actual balance, system will auto-create adjustment record';
+
   @override
   String get accountDeleteWarningTitle => 'Confirm Delete';
 

lib/l10n/app_localizations_zh.dart

@@ -3459,6 +3459,15 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get accountInitialBalanceHint => '请输入初始资金（可选）';
 
+  @override
+  String get accountBalanceCurrent => '当前';
+
+  @override
+  String get accountBalanceTarget => '输入目标余额';
+
+  @override
+  String get accountAdjustmentHint => '输入实际余额，系统将自动创建平账记录';
+
   @override
   String get accountDeleteWarningTitle => '确认删除';
 

lib/l10n/app_zh.arb

@@ -1395,6 +1395,9 @@
   "accountTypeOther": "其他",
   "accountInitialBalance": "初始资金",
   "accountInitialBalanceHint": "请输入初始资金（可选）",
+  "accountBalanceCurrent": "当前",
+  "accountBalanceTarget": "输入目标余额",
+  "accountAdjustmentHint": "输入实际余额，系统将自动创建平账记录",
   "accountDeleteWarningTitle": "确认删除",
   "accountDeleteWarningMessage": "该账户有 {count} 笔关联交易，删除后交易记录中的账户信息将被清空。确认删除吗？",
   "@accountDeleteWarningMessage": {